Thank you for rating our plugin without trying it. The license description you missed is this:
Iframely is a commercial plugin powered by the Iframely cloud API. Every embed creates a cloud workload, and an active service subscription is required for commercial use or production installations. Otherwise, we offer a free full-featured 30 day trial period so you can give Iframely a try before deciding.
So, basically, you reviewed a product without reading the terms or even using the trail.